Article 23

Where there is a serious threat to public policy or internal security, a Member State may exceptionally reintroduce border control at its internal borders for a limited period of no more than 30 days or for the foreseeable duration of the serious threat if its duration exceeds the period of 30 days, in accordance with the procedure laid down in Article 24 or, in urgent cases, with that laid down in Article 25. The scope and duration of the temporary reintroduction of border control at internal borders shall not exceed what is strictly necessary to respond to the serious threat. If the serious threat to public policy or internal security persists beyond the period provided for in paragraph 1, the Member State may prolong border control on the same grounds as those referred to in paragraph 1 and, taking into account any new elements, for renewable periods of up to 30 days, in accordance with the procedure laid down in Article 26.

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Source: EUR-Lex (Cellar) · retrieved 2026-11-14 · Text as adopted (Official Journal); later amendments are not incorporated in this text.